Comtuper

 In computers, magnets have many uses:
●Hard Disk Drives
Data are stored in hard disk drives on the basis of magnetism. The surface of the disk is coated with magnetic material that consists of billions or even trillions of tiny magnets. 
●Cooling Fans
A motor is an essential part of an electrical fan, and all motors contain magnets since they use magnetism and electricity to induce motion.
●Optical Disc Drives
Moving parts of computers like the lens and the eject mechanism of optical disc drives require motors to enable their motion and thus, involve the use of magnets since all motors operate using magnets.